Author
Elamassie, Mohammed, Uysal, Murat
Publication Date
2020-04
Publication Place
-
IEEE
Subject
Free space optical communication, Lognormal fading, Incremental diversity order, Asymptotic analysis
Type
Periodical
Language
English
Digital
Yes
Manuscript
No
Library
Özyeğin University
Library Asset ID
1089-7798
Record ID
51cb94ef-4f4b-4a18-9a60-6772c8a47897
Library Location
Electrical & Electronics Engineering
Date
2020-04
Notes
TÜBİTAK
Sample Text
Free space optical (FSO) communication systems experience atmospheric turbulence-induced fading, which is typically modelled by lognormal distribution. Since the decreasing rate of error probability over lognormal fading channels does not converge to a finite value, the conventional definition of diversity order yields infinity and does not provide any insight into system design. In this letter, we propose the so-called incremental diversity order (IDO), which is defined as the incremental change in the decreasing rate of bit error rate (BER) on a log-log scale. As an example, we consider multiple-input multiple-output (MIMO) FSO system over lognormal turbulence channels. We derive a novel closed-form BER expression in terms of Lambert-W function and obtain IDO as a function of the number of laser sources, the number of photodetectors and the variance of the log-amplitude coefficient. We further present numerical results to validate the derived BER expression and associated IDO.
DOI
10.1109/LCOMM.2020.2966479
Cilt
24
